/// <summary>
/// Adds the XML Namespaces neccessary to make BillPay SOAP requests
/// </summary>
/// <param name="et">The element tree for the SOAP request</param>
private void AddXMLNS(ElementTree et)
{
et.AddNamespace("soapenv", @"http://schemas.xmlsoap.org/soap/envelope/");
et.AddNamespace("bil", @"https://test.heartlandpaymentservices.net/BillingDataManagement/v3/BillingDataManagementService");
et.AddNamespace("bdms", @"http://schemas.datacontract.org/2004/07/BDMS.NewModel");
et.AddNamespace("hps", @"http://schemas.datacontract.org/2004/07/HPS.BillerDirect.ACHCard.Wrapper");
et.AddNamespace("pos", @"http://schemas.datacontract.org/2004/07/POSGateway.Wrapper");
et.AddNamespace("bdm", @"https://test.heartlandpaymentservices.net/BillingDataManagement/v3/BDMServiceAdmin");
}
